Ventilator



Dec. 10, 1929. sMMoNs 'ET AL VENTILATOR Filed March 14, 1929 2 Shet, cs-Sheet :Swentors Dec. '10, 1929. L. sMMoNs ET AL VENTILATOR 2 SheetS-Sheet Filed March 14, 1929 m spirit and scope thereof. small universal high speed electric motor with mente-a Dec. o, 1929 ',739,o s2

.UNITED STATES'PATENT OFFICE LEO SmMONB BEEKELY LEO SIMMONS, OF 'WASHINGTON, DISTRICT OF COLUMBA VENTILATOR Application filed March 14, 1929. -serial No. 347421.

This invention relates to improvements inthrust hearing for the armature shaft of the Ventilators; and the objects and nature of motors shown. the invention will be understood by those F ig. 7 is a vertical section of a wall or skilled in the art in the light of the folloW- ceiling showing a modified form of the ining explanations of the accompanying draw- Vention mounted therein and extending thereings that illustrate what we now believe to through, V be the preferred mechanical expressions or Fig. 8, is a detail detached perspective of embodiments of our invention from among the motor support of Fig. 6. other forms and arrangements within the In the embodiments illustrated, we show a We have discovered that a small size high enclosed housing 1,` and rotary motor shaft 2, speed universal electric mo'tor fitted with at its rear end, carrying and having a concene, an appropriate rotary exhaust fan, when tric air exhausting suction blade rotor such as combined with and mounted in 'an air tuneXhaust fan 3, fixed .thereto. The motor nel or duct hearing certain approximate reshown is approximately two and one-half lations to the fan, attains certain effective nches in diameter, and the blades or vanes of and new results as a means for exhausting its siX-inch fan or air exhausting suction stagnant air and foul cooking odors from blade rotor are so set and of such formation as living rooms and kitchens, and hence an obto attain high suction efliciency, in the combiject of our invention is to produce an inexnation of the invention, in rapidly withdraw- 7 pensive small compact 'ventilating unit paring air or foul odors from a room, when operticularl for residences, ofiices, cafes, and ated at a high speed.

such, o remarkably high efliciency and sim- 'l'his motor 1, is mounted in normal fixed re-^ 4 plcity, and adapted to be driven by alterlat-lon concentrically within an air duct or nating or direct electric power circuits. ventilating exhaust air tunnel duet, or pipe 4, 75

With the foregoing and other objects in with the exhausting rotor .concentrically arview, our invention consists in certain novel 'ranged within said ventilating duct intermefeatures, and in combinations and arrangediate the length thereof and spaced a substanments, as more fully and particularly set tial distance from the intake end of the duet.

3@ forth and specified hereinafter. Where the diameter of the fan is six inches,

Referring to the accompanying drawings, the internal diameter of the cylindrical duct forming a part hereof or air ipe 4 should not be more than six and Fig. 1 is a perspective showing an emone-ha f inches; according to our developbodiment of our invention mounted in the ments and findings to date, the maxi i upper sash of a wnow i ternal diameter of the cylinder should be but 35 Fig. 2 shows the ventilator unit of Fig. slightly larger than the exterior diameter of 1 in vertical longitudinal section. i the motor-driven exhausting rotor, to aflord Fig.. 3 is a detail detached perspective of v only the necessary clear as Where a X the main frame and motor mounting of said nch air sucton rotor is used the air duct 40 unit. r should notbe more than from eight to ten ne Fig. 4 is a detached detail perspective of p t arger. V the cushioning means interposed between In the preferred embodiment, the main the motor housing and the clamp supportframe of the unit, embodies a strong, prefering the motor. i i r ably metal, ring or cylindrical annulus 5, hav- Fig. 5 is a vertical section through a ing intermediate radial surrounding exterior room ceilin and the unit of Fig. 2 mounted 'supportin flange fixed to supporting plate therein an extended therethrough with a 6, which can be inserted and Secured in a panstraight instead of elbow air pipe or duet. el window sash 7 or otherwise, to close the Fi 6 isa detail longitudinal *section opening n place of a glass or panel. .This

se showng the lubricant cup and the end annulus constitutes the main carrying or supporting frame of the self contained ventilat ing unit or assembly and also forms the intake `end thereof to be located in the room or space tobe ventilated.

The ventilating pipe 4 is preferably cylindrical and of substantially uniform diameter throughout its length, and the intake end of this pipe length is exterorly slipped onto the outer end of the supporting annulus 5 and within the hole cut th erefor in supporting plate 6, and is suitably securedto the annulus, so that the annulus supports'said pipe by its inner end with the horizontal pipe projecting outwardly from a window or opening, the outer portion of the cylindrical impertorate wall pipe, being deflected downwardly, or of elbow form, to exclude rain, snow, etc. and open at its outer end for free exit of the air exhausted from the room being ventilated. The supporting annulus constituting the in- 'take end of the Ventilating duct is provided with and carries a suitable damper located at the intake side thereof to be accessible within the room to be ventlated, to control or to prevent back draft into the room when the suction rotor is at rest. For instance, among other forms of dampers, in the example shown, the inlet end of the air blast tunnel or pipe is covered by a dome 8, providing transverse slots or openings for the passage of air. In this instance, the openings are in the form of elongated spaced Slots, 8 radiatng from the central portion of the dome or crown, and a rotary concavo-convex Shutter 9, can be provided slidable on the dome or crown and having corresponding spaced radiating slots 9 whereby the shutter can be rotated to close or open the air inlet slots of the crown or dome. n the example shown, the Shutter 9, is fixed to and carried by a central rotary spindle 10, having an exposed knurled knob l0, and at its inner end rotatably mounted and confined in the central portion of the dome. slidably engages the 'dome under suflicient friction to maintain the position to which set by lnob 10 and yet the Shutter can be easily turned to close or open the air tunnel or duet. The supporting annulus 5, is ormed integral with internal rearwardly and inwardly converging arms that are more or less resilient, and at^their inner ends' these arms are rigid with and carry a central split ring clan the similar opposing members or jaws o which are adjustably Secured together by nuts and bolts 11, entering parallel ears 5, projecting radially from jaws The clamp 5 11, surrounds the motonand, preferabl has a cushioning material lining 12, (Fg. 4) interposed between the inner surfaces ofthe clamp and the exterior surface of the motor casing. The motor is rigidlv secured by contracting the jaws by the bolts 11. The rearward inclination of arms 5, and

' the ring clamp, hold the motor with its longitudinalaxis alined with the longitudinal axs 'space above the ceiling.

The Shutter,

of the annulus, while the ring clamp and consequently the motor carried thereby are located in a vertical plane spaced nwardly within the ventilating duct beyond the vertical plane of the annulus 5, at the intake end of the duet, .to locate the air exhasting rotor at the required distance within the ventilating duet from its intake end.

The slightly resilient arms 5, are designed not only to permt openin and closing the ring clampbut also to aid n the absorp'tion of motor vibrations and noise, while the cushioning material 12, also aids in preventing the transmission of vibration and noise.

Fig., 5 shows the ventilating unit of Fgs. 1-4, extending through and fitted in a hole cut through ceiling 14, and Secured b screws 13, extending through flange S of t ie annulus 5, into the ceiling, the air blast pipe duct 4, being straight and. cylindrical throughout, its len th instead of deflected down at its outer end. Tn Fig. 5, the inner end of pipe 4, slides over the outer end of annulus 5, and can be secured by screws 4, and also the inner end dome 8, slides over the inner end of annulus 5, and can be Secured by screws 8, all as in Figs. 1 and 2.

In the arrangement of Fig. 5, the motor shaft is vertical and the horizontally rotating fan 3, is fixed on the projecting upper end of said shaft, while the lower end of the shaft (Fig. 8) is upheld bya stop or end thrust bearing 2, running in lubricant carried by cap 2, Secured to the motor casing, which also applies to the motors of Figs. 1, 2, and 6.

The lower or inlet end of duet 4, (Fig. 5) opens through the ceiling into the room while the upper end of said duet discharges into an ofl'take space or flue or into the atmosphere In F ig. 6, the annulus 5, asin Fig. 5, fitted and secured in a vertical hole inthe ceiling, while air blast pipe 4 is of elbow formation to eXtend vertically in continuation of an nulus 5, and then laterally to discharge the air laterally or horizontally through a discharge opening in a vertical wall or otherwise. In this modification, the converging arms 5, of the annulus are onitted, and the motor is carried by a separate bracket forming a vertical base 15, depending within the annulus 5, and Secured thereto by screws 16. The upper portion of the bracket forms a pair of slightly resilient arms 15** forming the split ring clamp composed of opposing segmental j aws 15", to

surround and tightly clamp the motor 1, as

hereinbefore described. The j aws' 15, are tightened 'on the packing 12, on the motor by clamping nut and bolt 17, connecting ears 15.

The arms 15 extend from base 15, at an upward and lateral inclnation to hold the fan motor at an angle or inclination corresponding to the angle of the elbow, with the motor shaft longitudinally and centrally arranged in or to the air bl ast duet, with its exhaust fan on the uppe-r end of the shaft to function as hereinbefore described.

High speed universal motors are produced e at comparatively low prices, and by operating same forthepurpose named in a close fitting cylinder or pipe, a -very small motor will show amuch higher result and efliciency than a larger motor without such enclosing arrangement. We have discovered that by equipping such a high-speed small low-cost universal motor with an approximate small exhaust rotor, and combining such electric motor driven rotor with an appropriate air blast duet with the exhausting rotor located therein a substantal distance from the duct intake that receives the air from the room to be Ventilated, approximately in the manner hereby disclosed, we attain surprising results, producing a comparatively very low-cost, lightweigl t, compact, small, economically operlating unit. For instance, we find that our unit of the approximate dimensions and small high speed motor hereinbefore described. will do better and more eflicient work than the ordinary expensive much larger exhaust motor blade rotor arranged concentrically within said pipe and spaced inwardly thereof from said annulus, clearance being provided between the circumferential exterior of the rotor and the surrounding inner surface of the pipe; and a motor carried by said annulus for driving said' rotor.

2. A Ventilating unit including a supporting frame providing an annulus; a damper carried by said annulus to control back draft through said intake; means providing a ventilating duct of substantial length and approximate uniform size throughout its length alined with and in continuation of said annulus to receive the air drawn from the room and convey said air to and permit'its escape at the exterior of the room; a high-speed air exhausting rotor arranged within said duet and spaced inwardly thereof fromsaid annulus; and ahigh speed relativel small motor arranged longitudinally of sai w duct between said rotor and said annulus and carrying and driving said rotor to rapidly exhaust air rom the room through said annulus and uct. v

3. A ventilating unit including a ventii lating pipe; an annulus constituting the 'main supporting structure of the unit receiving the inlet end of said pipe and by which the pipe is sup orted in alnement with the annulus, where y the annulus is ar-- centrally and longitudinally arranged within said pipe.

4. A ventilating unit for exhausting air from a room or space and discharging at the exterior thereof, said unit including a ventilating air exhaust pipe; a main supporting annulus for said pipe constituting the air intake thereto; an air exhausting suction blade rotor arranged concentrically within said pipe and spaced a substantial distance inwardly thereof from said annulus, clearance being provided between the crcumferential exterior of the rotor and the surrounding inner surface of the pipe; said annulus having substantially resilient arms extending into said pipe and at their inner ends provided with a motor support; and a motor held by said support for driving said rotor.

5. A self-contained compact room ventilating unit including a ventilating pipe; an annulus constituting the main supporting structure of the unit receiving the intake end i of said pipe, an air exhausting rotor concentricall arranged within said pipe and spaced inwar ly thereof from said intake; a rotor driving motor of relatively small diameter carrying said rotor; and arms carried by said annulus and provided with a central vibration-absorbing and cushioning motor supporting clamp holding said motor within said pipe. i

6. In a ventilating unit, in combination, a main supporting annulus; a damper carried by and arranged at the intake side of said annulus for controlling back draft; an air 'exhausting pipe at its intake end coupled to the annulus and longitudinally alined with and of approximatel the same capacity as the intake opening t rough the annulus; a high-speed air exhausting suction blade rotor longitudinally arranged a distance within said pipe from said annulus intake; and a relatively small high-speed motor carried by sai-d annulus for driving said rotor.

Signed at Washington, D. C., this 12th day of March, 1929.

LEO SIMMONS. BERKELEY L. SIMMONS. 

